化工学报 ›› 2011, Vol. 62 ›› Issue (S2): 140-143.DOI: 10.3969/j.issn.0438-1157.2011.z2.024

• 材料化学工程与纳米技术 • 上一篇    下一篇

全钒液流电池阴极电解液稳定性

李小山1,2,谢晓峰2,吕亚非1   

  1. 1北京化工大学材料科学与工程学院;2清华大学核能与新能源技术研究所
  • 收稿日期:2011-12-03 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 李小山

Catholyte electrolyte stability for all-vanadium redox battery

LI Xiaoshan1,2,XIE Xiaofeng2,LV Yafei1   

  • Received:2011-12-03 Online:2011-12-20 Published:2011-12-20

摘要: 在钒硫酸溶液中加入添加剂,对钒电池阴极电解液的稳定性进行了研究。利用循环伏安法和交流阻抗法分别对含1%的草酸、草酸铵、乙二胺四乙酸、葡萄糖、D-果糖、α-乳糖的V(Ⅲ)硫酸溶液进行了分析测试。实验结果表明:添加上述添加剂后,溶液中V(Ⅲ)的溶解度和稳定性有所提高,羧酸类化合物比羟基类化合物的效果更加明显,更适合作为阴极电解液的添加剂。当采用1%草酸的1.8 mol· L-1 V(Ⅲ)硫酸溶液作为阴极电解液和2 mol·L-1 VOSO4硫酸溶液作为阳极电解液组装钒电池时,电池的充放电性能表明此时钒硫酸溶液具有较高的单位体积电容量。

关键词: 钒电池, 阴极电解液, 添加剂, 荷电状态

Abstract: Catholyte stability of VRB was studied by adding additives in the negative vanadium sulfate solution. The V(Ⅲ)sulfate solutions properties with 1% oxalic acid,ammonium oxalate,ethylene diamine tetraacetic acid,glucose,D-fructose and α-lactose were investigated by using cyclic voltammetry and AC impedance. The experimental results showed that the solubility and stability of V(Ⅲ)solution were improved. The solution containing a small amount of carboxylic acids was better than that containing hydroxyl compounds. The charge-discharge performance of the VRB(1.8 mol·L-1 V3+ sulfate solution with 1% oxalic acid as catholyte and 2 mol·L-1 VOSO4-H2SO4 solution as anolyte)had the higher unit volume capacity.

Key words: vanandium redox battery, electrolyte, additives, state of charge